Ecumenical Patriarch Eustathios

Ecumenical Patriarch Eustathios (965-1025) was the Ecumenical Patriarch of Constantinople from 1019 to 1025, succeeding Ecumenical Patriarch Sergios II and preceding Ecumenical Patriarch Alexios.

Biography
Eustathios was the Archpriest of the Imperial Palace of Emperor Basil II of Byzantium before becoming Patriarch of Constantinople in 1019, and during his reign he tried to maintain control over the Byzantine Empire churches in southern Italy. However, Pope John XIX rejected his plans.